Korean Journal of Applied Biomechanics (한국운동역학회지)

Korean Society of Applied Biomechanics (한국운동역학회)
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The Theta Analysis on the Components of Ground Reaction Force According to the Ground Conditions During Gait

보행 시 지면조건에 따른 지면반력 성분의 세타 분석

  • Ryew, Che-Cheong (Department of Physical Education, College of Natural Science, Jeju National University) ;
  • Hyun, Seung-Hyun (Department of Physical Education, College of Natural Science, Jeju National University)
  • 류재청 (제주대학교 자연과학대학 체육학과) ;
  • 현승현 (제주대학교 자연과학대학 체육학과)
  • Received : 2015.06.24
  • Accepted : 2015.09.30
  • Published : 2015.09.30
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Abstract

Objective : The purpose of this study was to investigate the theta on the components of ground reaction force according to the ground conditions during gait. Method : Six healthy women(mean age: 22 yrs, mean height: $166.14{\pm}2.51cm$, mean body weights: $56.61{\pm}4.58kg$) participated in this study. The medial-lateral GRF(Fx 1), anterior-posterior GRF(Fy 1, Fy 2), vertical GRF(Fz 1, Fz 2, Fz 3), and impact loading rate were determined from time function and frequency domain. Also, GRF theta were time function and forces. Results : Fx 1, Fy 1 and Fy 2 of stair descending showed significant statistically higher forces than that of level walking, and ascending. Fz 1 of stairs descending showed significant statistically higher forces than that of level walking and stairs ascending(theta $88.62^{\circ}$). Also, Fz 2 of level walking showed significant statistically higher forces than that of stairs ascending and descending(theta $65.78^{\circ}$). Fz 3 of stairs ascending showed significant statistically higher forces than that of level walking and stairs descending($65.26^{\circ}$). Impact loading rate of stairs descending showed significant statistically higher forces than that of level and ascending walking. The GRF showed similar correlation with GRF theta(r=.603) according to the ground conditions during gait. Conclusion : These results suggest that the GRF theta can be used in conjunction with a gait characteristics, prediction of loading rate and dynamic stability.

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References

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